Abstract:Twelve species of Fissidens are reported for Wuyanling National Nature Reserve, Zhejiang Province, China. Fissidens involutus Wilson ex Mitt. var. jejuensis Y.-J. Yoon, B.C. Tan & B.-Y. Sun, a new variety previously known only from Japan and South Korea, is reported here for the first time from China. This species is characterized by the bases of dorsal leaves are distinctly decurrent, and cells of vaginant lamina have single indistinctly papilla at each corner. Detailed description and illustrations of F. involutus var. jejuensis are provided. In addition, two species, viz. F. anomalus and F. serratus are new provincial records for Zhejiang Province. In Wuyanling, a humped distribution is observed of the Fissidens species diversity with the elevation. Compared with other nature reserves in southeastern region of China, the number of species of Fissidens in Wuyanling is the second only to Yachang Nature Reserve (Guangxi). Furthermore, species diversity of Fissidens does not increase as the latitude decreases in this region. Hence, it is recommended to carry out further investigation and study on the diversity of Fissidens in southeastern region of China.
